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AISI 418 Stainless Steel vs. AWS BAu-3

AISI 418 stainless steel belongs to the iron alloys classification, while AWS BAu-3 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.28
0.37
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 1100
220

Thermal Properties

Latent Heat of Fusion, J/g 270
160
Melting Completion (Liquidus), °C 1500
1030
Melting Onset (Solidus), °C 1460
970
Specific Heat Capacity, J/kg-K 470
300
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Density, g/cm3 8.0
13

Common Calculations

Stiffness to Weight: Axial, points 14
5.0
Stiffness to Weight: Bending, points 24
13
Strength to Weight: Axial, points 38
4.9
Strength to Weight: Bending, points 29
6.4
Thermal Shock Resistance, points 40
8.7

Alloy Composition

Carbon (C), % 0.15 to 0.2
0
Chromium (Cr), % 12 to 14
0
Copper (Cu), % 0
60.9 to 63
Gold (Au), % 0
34.5 to 35.5
Iron (Fe), % 78.5 to 83.6
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
2.5 to 3.5
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 2.5 to 3.5
0
Residuals, % 0
0 to 0.15